Type-writing machine.



W. P. MOLAUGHLIN- TYPE WRITING MACHINE.

APPLICATION FILED JUNE 27, 1910.

Patented July 25, 1911.

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WILLIAM P. MoLAUG'rI-ILIN, OF NEW YORK, N. Y., ASSIGNOR T0 UNDERWOOID TYPE- WRITER COMPANY, OF NEW YDRK, N. Y., A CORPORATION 015 DELAWARE.

TYPE-VTRITING MACHINE.

T 0 all whom it may concern:

Be it known that I, FVILLIAM P. Mo- LAUGHLIN, a citizen of the United States, residing in the borough of Brooklyn, city of New York, in the county of Kings and State of New York, have invented certain new and useful Improvements in Type-V riting Machines, of which the following is a specification.

This invention relates to typewriting machines equipped with two vibrating ribbons, either of which may be called into action, leaving the other idle.

The invention is applied to a two ribbon writing machine likethatshown in United States Letters Patent No. 926,054, granted June 22, 1909 to J. C. Deane, in which the ribbons are threaded through separate carriers or vibrators, which cover and uncover the printing point; either of said vibrators being operated at each type stroke while the other is silenced. The ribbon vibrators are coupled to levers which are pivotally supported on a bracket carried by the usual platen shift rail, so that said ribbon carriers may be shifted with the platen. The usual universal bar frame which is vibrated at each type stroke, supports a key-shifted yoke having slotted ears to engage either of two wrists projecting from the two levers respectively, to connect one lever or the other separately to the universal bar frame.

According to this invention, the usual shiftable yoke by which the ribbon vibrators are separately connected with the universal bar, has a single finger or stop shiftable with the yoke, to lock either ribbon vibrating lever when the latter is disconnected from the universal bar.

In the accompanying drawings, Figure 1 is a plan, illustrating the application of the invention to an Underwood two-ribbon writing machine, the stop being shown in position to lock one of the ribbon vibrators against operation. Fig. 2 is a detail plan, showing the stop in position to silence the other ribbon vibrator. Fig. 3 is a similar view, showing the connector in idle position. Fig. 4: is an end view, partly in section, showing the stop in operation, at the moment when the type strikes the platen. Fig. 5 is a detail rear view showing the adjustability of the connector. Fig. 6 is a detail view showing the connection between the locking finger, and yoke or connector.

Specification of Letters Patent.

Application filed June 27, 1910.

Patented J uly 25, 1911.

Serial No. 569,145.

Types 1 carried by type bars 2 hinged in tl e frame 3 of a writing machine, strike rearwardly through a guide 4t upon either a front ribbon 5 or a rear ribbon 6 lying in front-of a platen 7. Said ribbons are of different colors or qualities, the front ribbon 5 being wound upon a pair of spools-8 (one only of which is shown) mounted on opposite sides of the printing point, and in front of the platen, in cups 9. The ribbon 5, extending between these spools, is threaded through a vibrator 10 standing in front; of the platen 7. The rearribbon 6 is wound upon a separate pair of spools 11 (one only being shown) seated in cups l2, and threaded through a vibrator 13 mounted between the vibrator 10 and the platen, the ribbon vibrators, when at rest, leaving the printing point-on the platen exposed. Either ribbon carrier 10 or 13 is caused to cover the printing point at each type stroke, by any type bar 2, which, when swung to the platen, pushes rearwardly a universal bar or actuator 1 1, forming part of a frame 15 mounted on unright rocker arms 16.

A yoke or connector 17, mounted on a bracket 18 on the universal bar frame 15, is carried backward with the latter; said connector being shiftable from side to side and having slotted cars 19, 20, to separately en oppositely projecting wrists 21, 22 carried respectively by the levers 23, 24:. Said ears are spaced apart to free one wrist when the remaining ear is engaged with the opposite wrist. Said levers 23, 2 1 are pivoted at 25 to a bracket 26, extending from a rail 27 (through which the platen is shifted to upper case position) the opposite ends of the levers being pivoted at- 28 to the respective ribbon carriers 10 and 13, so that either one of the ears 19 or 20 has been set over to embrace the adjacent wrist (21 in 1, or 22 in Fig. 2) the universal bar 14 and connector 17 will rock the lever (23 or 2 11) and cause the vibrator 13 or 10 to cover the printing point. The connector is'shifted by means of keys 30, 3O at the opposite ends of a cross-arm 2'9 fixed to a shaft 31 journaled in brackets 32 on the frame 3, said shaft having an arm 33 pivoted to a part 34 of a link 35 pivoted to the connector 17, (Figs. 1 and To positively hold the idle ribbon ineffective, there is employed a lock which comprises a finger 36 having a base 37, shiftably supported on the platen shift rail 27 by means of screws 38 passing through a slot 39 in said base, the free end of the finger movable to overlie either lever 23 or 24:. The lock, by reason of its attachment to the platen shift rail, will be raised and lowered with the levers when the platen is shifted from lower to upper case position. The stop or look 36 is shifted by an arm 40 projecting from the connector 17, the arm having an ear 41 to which is attached a link 43 by means of a headed stud 42; said link connected to a part 44 on the finger 36. The stud moves in a slot in ear 41 as the rail 27 is shifted. The link -l3 accommodates the backward and forward movements of 41 and 40. hen the yoke 17 is shifted to disconnect the lever 23 and its vibrator 13 from the universal bar, and to connect the lever 2a and its vibrator 10 (Fig. 2), the locking finger 36 is simultaneously shifted to position to prevent movement of lever 23 and its vibrator. The reverse of this operation is illustrated in Fig. 1.

The space between the ears 19, 20 of the connector is greater than the distance between the outer ends of the lever wrists, whereby to enable the connector to assume an intermediate position (Fig. 3) to disconnect both vibrators from the universal bar, to allow the types 1 to strike against the platen without the interposition of a ribbon, as in stenciling.

Having thus described my invention, I claim:

1. In a typewriting machine, the combination with a pair of ribbon vibrators, levers connected to the vibrators, an actuator and a shiftable yoke or device to connect either lever with the actuator, of a lock c0nnected to the yoke and comprising a member shift able to lock either vibrator lever against movement when the other lever is in use.

In a typewriting machine, the combi nation with a pair of ribbon vibrators, and levers supported by a platen shift rail and connected to the respective vibrato-rs, an actuator vibrating at each type stroke, and a shiftable connector to couple either lever separately to the actuator, of a locking member shiftably supported on the platen shift rail to lock either vibrator, and shift able with the connector.

3. In'a typewriting machine, the combi nation with a pair of ribbon vibrators, le vers coupled thereto and supported by the platen shift rail, an actuator vibrating at the type strokes, and a shiftable connector to couple either lever separately to the actuator, of a stop shiftably supported on the platen shift rail to lock either of said levers when the other is active, a loose connection being provided betweenthe stop and connector, to permit movement of said shift rail.

4. In a typewriting machine, the combination of an actuator vibrated at each type stroke, a pair of ribbon carriers, levers to which. the carriers are connected, a keycontrolled mechanism for silencing either lever and bringing the other into use, and a lock controlled by said switching mechanism, and comprising a single member shiftable into the path of either one or the other of said ribbon-vibrating levers to lock the same.

WILLIAM P. MoLAUGrHLIN. lVit-nesses K. FRANKFORT, C. RIPLEY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

